Cotton-top Tamarin

Quick Take

• This tiny monkey has a communication system with actual grammatical rules, and what it reveals about the origins of language is unexpected. Discover the grammar rules →
• The dominant female controls who gets to reproduce in the group, and her method for doing so is stranger than you'd think. See the breeding system →
• Carl Linnaeus gave this species a name borrowed from a famous Greek myth, though nobody actually knows why. Explore the Oedipus name →
• Its social structure runs on a strict code of fairness, and members who break the rules face real consequences. Learn about social structure →

The crest is only the most visible outward characteristic of this amazing species. It has many other incredible features, including its agile climbing ability, its highly cooperative and altruistic social structure, and its intelligence and complex use of vocalizations.

Because of habitat loss and poaching, however, the cotton-top tamarin is in danger of extinction in the wild. Conservationists are committed to keeping this unique primate alive.

4 Cotton-top Tamarin Facts

• There are generally three types of cotton-top tamarins as classified by their facial features. They are bare-faced, mottled, or covered in fur.
• This species can leap approximately 10 feet in the air from tree to tree.
• The massive shock of white hair makes the monkey look almost human. In fact, the German name for this species is Lisztaffe, or Liszt monkey, after the Hungarian composer Franz Liszt. In his old age, Liszt was known for his long, flowing mane of white hair.
• In its native home of Colombia, the cotton-top tamarin is known simply as titís.

Evolution and Origins

The cotton-top tamarin is one of a trio of tamarin species inhabiting the Amazon, and resides in a limited region of northwest Colombia bounded to the north by the Atlantic coast, to the south and east by the Magdalena River, and to the west by the Cauca River.

Cotton-top Tamarins belong to the category of ‘New World’ monkeys, having crossed the Atlantic Ocean about 30 million years ago, and are typically smaller, being restricted to the tropical forests from southern Mexico to South America.

Further, Nsungwepithecus gunnelli is the shared forebear that marks the crucial divergence of monkeys and apes, and a noteworthy characteristic in the progression of New World Monkeys is their body mass, as the original species weighed only 0.9 lbs (0.4 kg), considerably less than the largest contemporary species at that time, which weighed 22 lbs (10 kg).

Classification and Scientific Name

The scientific name for the cotton-top tamarin is Saguinus oedipus. The name was given by the legendary zoologist and botanist Carl Linnaeus in 1758. He is widely regarded as the father of modern taxonomy.

It is not actually known why Linnaeus chose this name. Although famous for its association with the mythical Greek king, the name Oedipus means swollen-footed — an odd choice since the species does not have particularly large feet.

The species is closely related to Geoffroy’s tamarin, the white-footed tamarin, and all other tamarins within the same genus. More distantly, the cotton-top tamarin is related to the marmosets of South America. Together, tamarins and marmosets make up the family Callitrichidae.

Appearance and Behavior

The cotton-top tamarin is a small arboreal monkey with a body length of about 7 to 10 inches — the tail adds another 10 inches or so — and a weight of only one pound. This is barely larger than a squirrel. The males and females have the same size and appearance.

Because it has claws instead of nails and no prehensile tail, this species is a little different from most New World monkeys. But even without a prehensile tail, the cotton-top tamarin is an expert climber that spends much of its time navigating the branches high above the ground. Lacking opposable thumbs, it relies on its sharp claws to cling tightly to the bark of trees.

The cotton-top tamarin has a highly developed social structure built around the need for cooperation and altruism. Known as a troop or tribe, the group consists of three to nine individuals (though sometimes up to 19 individuals) with a dominant mating pair, the offspring, and sometimes the immediate family. The dominant pair is responsible for the safety of the group and the continuation of the family line.

The rest of the group adheres to a very specific hierarchy and rank based on dominance. Everyone within the group has a role, particularly when it comes to raising the young. Groups are not always permanent, and sometimes a monkey will leave one group to join another.

The cotton-top tamarin exhibits what could perhaps be described as a finely developed sense of fairness. Everyone in the group is expected to sacrifice for the good of the whole, and the failure of any member to cooperate could invite retribution and punishment.

The evidence suggests that there is an element of calculation to the monkey’s altruism. Each individual makes decisions about how to treat other members based on past behavior and expectation of future cooperation.

In order to communicate with each other, the cotton-top tamarin appears to have a complex suite of calls, including whistles, trills, and chirps. Although obviously not as well-developed as human language, these vocalizations do appear to have grammatical rules for communicating the individual’s intentions, emotional states, and facts about the world.

For example, studies have shown that this species can add syllables to words as a way to modify the meaning. This suggests that grammatical rules may have evolved from the ability to remember and track the position of words or any other object in a sequence.

The cotton-top tamarin is most active during the day between sunrise and sunset. Most of its time is spent foraging for food, raising the young, and engaging in social activities such as playtime and mutual grooming.

The group is fiercely territorial and will try to ward off intruders with loud calls and a display of its rear end and genitals. It also uses scent glands to mark its territory and possibly signal reproductive availability. The females appear to use the scent gland 10 times as much as males.

Hair and Body Color

The cotton-top tamarin is named after the striking crest of white hair that adorns its head from the forehead to the shoulders. White hair is believed to play a role in some of its behavior. When agitated in some way, the tamarin can raise the hair on its head to make itself appear much bigger than it actually is. The white plume also helps the monkey secure a mate as part of its courtship rituals.

In addition to the mane, this species also has white hair on its chest and legs. The remaining body is covered in a kind of black, reddish-brown, and orange fur. The black skin along certain parts of the face, limbs, and the rear end is covered in very short and fine gray hairs in some tamarins.

Habitat

The cotton-top tamarin is native to the rainforests and woodlands of northwestern Colombia. The species was once dominant over much of the Colombian forests, but its natural range has gradually shrunk and become fragmented with the spread of human civilization. The species resides in large trees, where it hunts, plays, and sleeps. The home range is largely chosen for the abundance of food in the area.

Population

The cotton-top tamarin is one of the rarest species of living primates in the world. It is estimated that there are fewer than 6,000 individuals remaining in the wild. Perhaps only 2,000 of these are mature monkeys. Many more tamarins live in captivity, perhaps even outnumbering the wild population.

Conservation Status

According to the IUCN Red List, the cotton-top tamarin is critically endangered. Due to the fragmented nature of the remaining populations, it is at serious risk of extinction. Much of the conservation effort is focused on preserving what remains of the indigenous rainforests.

This means working with local farmers and ranchers to prevent future deforestation and create new protected areas with special safety corridors for the tamarins to travel through. Many preserves and zoos are also attempting to breed the species and rehabilitate population numbers.

Diet

The cotton-top tamarin is an omnivorous species that feeds on a combination of plant matter and animal matter. The vast majority of the diet consists of fruits and insects, as well as the gums of trees. Because it lacks large incisors to chew through the bark, this tamarin species must rely on other animals to open the bark in order to access the gum inside. The rest of the diet includes reptiles, rodents, and other animals.

This tamarin spends a great deal of its time casually foraging for food in the middle layers of the forest canopy. This involves a lengthy process of searching for edible plants or investigating small hiding spots for potential prey. When it encounters a reptile or rodent, the monkey can kill it with a severe bite to the head. This species also plays an important ecological role by dispersing large seeds throughout the environment. It can travel a few miles every day in search of food.

Predators and Threats

The cotton-top tamarin has much to fear from snakes, birds of prey, jaguars, and other wild cats. The canopy offers a degree of protection from hungry predators, but an individual tamarin needs the protection of the entire group to fully survive the dangers of the wild. Human activity presents another major challenge. Both habitat loss and poaching have caused numbers to dwindle dramatically, threatening the survival of the species.

Reproduction, Babies, and Lifespan

Evidence suggests that the cotton-top tamarin’s reproduction is largely driven by a monogamous relationship between the dominant pair (though polygamous relationships have also been observed). The dominant female has exclusive breeding rights.

She suppresses the breeding ability of the other females by releasing pheromones that prevent conception. If the dominant female dies, then the next highest female, usually a daughter, will inherit those breeding rights.

Once impregnated, the dominant female will carry and give birth to twin babies to coincide with the rainy months of January to June due to the availability of food. The gestation period lasts four to six months. The young are then born with eyes open, a small mane, and covered in fur. They weigh approximately 15% to 20% of the mother’s body weight.

The entire group shares the responsibility of caring for the children as a team. Parental care must be learned through experience, and an inexperienced parent or caregiver might abandon or abuse the child instead. While nursing is the female’s role, the males appear to spend more time and effort on child care overall.

Cotton-top tamarins develop relatively quickly for a primate. By week 14, they will become independent enough to move on their own without the help of an adult. By the year-and-a-half mark, females will become sexually mature. By the 24th month, males will finally reach sexual maturity as well. The typical lifespan of this species is somewhere between 10 and 13 years in the wild.

Zoo

The cotton-top tamarin is a common sight in many zoos across the United States, including the Central Florida Zoo and Botanical Gardens, the St. Louis Zoo, the Oakland Zoo, the Central Park Zoo, Zoo Boise, the Phoenix Zoo, the Franklin Park Zoo in Boston, the Potter Park Zoo, and the Peoria Zoo in Illinois. Many of these zoos are committed to keeping the species alive through specialized breeding programs.